Few available for $100 each.
Also available 30 amp pwm charge controllers for $35 each.
Maximum Power(Pmax): 200W Maximum Power Voltage(Vmp): 20.4V
Maximum Power Current(Imp): 9.80A
Open Circuit Voltage(Voc): 24.3V Short Circuit Current(Isc): 10.2A Maximum System Voltage(Vmax): 1000VDC
Temperature Range: -40°C ~ 90°C Max Series Fuse Rating: 15A
Weight: 21 lbs
Dimensions: 52.5x26.4x1.4 in